#!/usr/bin/env node

const pi = Math.PI;

class Circle {
  constructor(radius) {
    this.#r = radius;      
  }
  get diameter() {
    return 2 * this.#r;     
  }
  get circumference() {
    return pi * 2 * this.#r;     
  }
  get area() {
    return pi * this.#r * this.#r;   
  }
  #r = 0;
}

module.exports = Circle;

console.log(module);

